US20210131426A1 - Plunger pump - Google Patents

Plunger pump Download PDF

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Publication number
US20210131426A1
US20210131426A1 US17/004,276 US202017004276A US2021131426A1 US 20210131426 A1 US20210131426 A1 US 20210131426A1 US 202017004276 A US202017004276 A US 202017004276A US 2021131426 A1 US2021131426 A1 US 2021131426A1
Authority
US
United States
Prior art keywords
plunger
pump
bracket
motor
pump head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US17/004,276
Other languages
English (en)
Inventor
Donghui Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinano Kenshi Co Ltd
Original Assignee
Shinano Kenshi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinano Kenshi Co Ltd filed Critical Shinano Kenshi Co Ltd
Assigned to SHINANO KENSHI CO., LTD. reassignment SHINANO KENSHI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, DONGHUI
Publication of US20210131426A1 publication Critical patent/US20210131426A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20—Other positive-displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20—Other positive-displacement pumps
    • F04B19/22—Other positive-displacement pumps of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0042—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member
    • F04B7/0046—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member for rotating distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0042—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member
    • F04B7/0053—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member for reciprocating distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms

Definitions

  • the present disclosure relates to a plunger pump.
  • Japanese Unexamined Patent Application Publication No. 2017-137780 describes a plunger pump including a front frame to which a pump head is fixed.
  • a plunger pump including: a motor; a bracket attached to the motor; a holding member fixed to the bracket; a plunger extending in a axial direction; a pump head holding the plunger such that the plunger is capable of rotating and reciprocating in the axial direction; and a joint mechanism for converting rotation of the motor into rotation and reciprocation of the plunger, wherein the holding member includes first and second plate members each formed into a flat plate shape, and the first and second plate members are parallel to each other so as to sandwich the pump head.
  • FIG. 1 is an external view of a plunger pump
  • FIG. 2 is an external view of the plunger pump
  • FIG. 3 is an external view of the plunger pump
  • FIG. 4 is a cross-sectional view taken along A-A line of FIG. 3 ;
  • FIG. 5 is a view of only the plate members.
  • FIGS. 1 to 3 are external views of a plunger pump 1 .
  • FIG. 4 is a cross-sectional view taken along A-A line of FIG. 3 .
  • the plunger pump 1 includes a motor 10 , a bracket 20 , plate members 30 , a joint mechanism 40 , a plunger 50 , a nut 60 , and a pump head 70 .
  • the bracket 20 is fixed to an outer surface of the motor 10 from which a rotational shaft 12 thereof protrudes.
  • the bracket 20 includes: a fixed plate portion 22 fixed to the outer surface of the motor 10 ; and two connecting wall portions 24 protruding from the fixed plate portion 22 toward a distal end side of the rotational shaft 12 of the motor 10 and parallel to each other. Proximal end portions of the two plate members 30 are respectively fixed to the two connecting wall portions 24 .
  • the pump head 70 is sandwiched and held by distal ends of the two connecting wall portions 24 .
  • the plate member 30 is fixed to the connecting wall portion 24 so as to adjust an angular position of the plate member 30 with respect to the connecting wall portion 24 .
  • the plate member 30 is fixed to overlap the connecting wall portion 24 by Hexagon Socket Head Cap Screws (hereinafter referred to as screw bolts) B 1 and B 2 .
  • a receiving hole 25 formed in the connecting wall portion 24 through which the screw bolt B 1 penetrates is formed into an arc shape.
  • a center of this arc shape is a screw hole, formed in the connecting wall portion 24 , through which the screw bolt B 2 penetrates.
  • the plate member 30 is formed with screw holes 35 and 36 screwed with the screw bolts B 1 and B 2 , respectively.
  • the screw bolt B 1 is capable of fixing the plate member 30 at any angular position within the arc-shaped receiving hole 25 .
  • the plate member 30 is fixed to the connecting wall portion 24 at an adjustable angular position in a range of the receiving hole 25 about the screw bolt B 2 .
  • the joint mechanism 40 is fixed to the distal end of the rotational shaft 12 protruding from the motor 10 .
  • the joint mechanism 40 connects the distal end of the rotational shaft 12 and a proximal end of the plunger 50 such that the rotational motion of the rotational shaft 12 is converted into the rotational motion of the plunger 50 and the reciprocating linear motion of the plunger 50 in the axial direction.
  • the plunger 50 performs a reciprocating linear motion while rotating.
  • the joint mechanism 40 includes a spherical bearing 41 , a pin 42 , and a sleeve 43 .
  • the spherical bearing 41 holds a proximal end of the pin 42 such that the pin 42 pivots on the proximal end thereof.
  • a distal end of the pin 42 is connected to the proximal end of the plunger 50 via the sleeve 43 .
  • the spherical bearing 41 revolves around an axis of the rotational shaft 12 , and the pin 42 pivots.
  • the plunger 50 linearly reciprocates while rotating, because an axial direction of the plunger 50 is inclined with respect to the axial direction of the rotational shaft 12 .
  • the spherical bearing 41 , the pin 42 , and the sleeve 43 are made of, but not limited to, metal.
  • the plunger 50 only rotates, in such a posture that the axial direction of the rotational shaft 12 is the same as the axial direction of the plunger 50 .
  • the plunger 50 is made of, for example, but not limited to, ceramic.
  • the pump head 70 includes a pump bracket 71 , and a cylinder 78 held within the pump bracket 71 .
  • the cylinder 78 has a cylindrical shape and fits into a cylindrical inner surface formed within the pump bracket 71 .
  • a proximal end of the pump bracket 71 is screwed with the nut 60 for preventing leakage of liquid from a gap between the pump bracket 71 and the cylinder 78 .
  • the distal end of the plunger 50 is inserted inside the cylinder 78 via the nut 60 .
  • the plunger 50 linearly reciprocates while rotating within the cylinder 78 .
  • a cylinder chamber S is defined by the distal end of the pump bracket 71 , an inner side of the cylinder 78 , and the distal end of the plunger 50 .
  • the internal volume of the cylinder chamber S increases or decreases in response to the linear reciprocation of the plunger 50 .
  • a cut surface is provided on an outer surface of the distal side of the plunger 50 located within the cylinder 78 .
  • the cut surface with a predetermined length in the axial direction is notched in a half range in a circumferential direction.
  • the cut surface is spaced away from the inner surface of the cylinder 78 .
  • a predetermined gap is ensured between the cut surface and the inner surface of the cylinder 78 . This gap and the cylinder chamber S are communicated to each other.
  • a suction nozzle 73 a and an inlet nozzle 75 a are formed on one of the two sides of the pump bracket 71 that are not sandwiched by the two plate members 30 .
  • a discharge nozzle 73 b and an outlet nozzle 75 b are formed on the other side of the two sides of the pump bracket 71 that are not sandwiched by the two plate members 30 .
  • the suction nozzle 73 a and the discharge nozzle 73 b are located close to the distal side, but the inlet nozzle 75 a and the outlet nozzle 75 b are located distant from the distal side.
  • the suction nozzle 73 a, the discharge nozzle 73 b, the inlet nozzle 75 a, and the outlet nozzle 75 b each has a flow path that is communicated to the inside of the cylinder 78 through the pump bracket 71 .
  • the flow path of the suction nozzle 73 a and the flow path of the discharge nozzle 73 b are alternately communicated to the cylinder chamber S through the cut surface, and the volume of the cylinder chamber S increases and decreases.
  • the liquid introduced from the suction nozzle 73 a is discharged from the discharge nozzle 73 b through the cylinder chamber S.
  • the inlet nozzle 75 a and the outlet nozzle 75 b are provided for introducing and discharging cleaning liquid into and out of the interior.
  • the pump bracket 71 of the pump head 70 is made of synthetic resin.
  • the pump bracket 71 is integrally formed with the suction nozzle 73 a, the discharge nozzle 73 b, the inlet nozzle 75 a, and the outlet nozzle 75 b.
  • Male screwed portions are respectively formed around circumferences of the suction nozzle 73 a and the discharge nozzle 73 b.
  • the male screwed portion of the suction nozzle 73 a is screwed with a female screwed portion of a pipe for supplying the liquid.
  • a male screwed portion of the discharge nozzle 73 b is screwed with a female screwed portion of a pipe for discharging the liquid.
  • the male screwed portions of the suction nozzle 73 a and the discharge nozzle 73 b are also made of synthetic resin. This reduces the manufacturing cost, as compared to, for example, a case where the above male screwed portions are made of metal.
  • the cylinder 78 is also made of synthetic resin, but may be made of metal.
  • FIG. 5 is a view of only the plate members 30 .
  • the plate member 30 is formed into a flat plate shape, and the bending process is not performed in the plate member 30 . For this reason, the manufacturing cost is reduced, compared to a plate member in which the bending process is performed.
  • the two plate members 30 are examples of holding members, and are examples of first and second plate members.
  • the screw bolts B 7 and B 8 for fixing the plate member 30 to the pump bracket 71 of the pump head 70 are screwed into screw holes 37 and 38 , respectively.
  • the screw holes 37 and 38 are aligned in the axial direction of the plunger 50 .
  • the screw bolt B 8 is close to the distal end of the pump head 70 , and the screw bolt B 7 is not close thereto.
  • the screw bolt B 8 is located between the distal end and the screw bolt B 7 . In such a way, the two plate members 30 are held in the proximal side of the pump head 70 with the screw bolts B 7 , and in the distal side of the pump head 70 with the screw bolts B 8 .
  • the screw bolts B 7 and B 8 are examples of first and second fixing members, respectively.
  • the first and second fixing members are not limited thereto, and may be screws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
US17/004,276 2019-11-05 2020-08-27 Plunger pump Abandoned US20210131426A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-200948 2019-11-05
JP2019200948A JP2021076028A (ja) 2019-11-05 2019-11-05 プランジャポンプ

Publications (1)

Publication Number Publication Date
US20210131426A1 true US20210131426A1 (en) 2021-05-06

Family

ID=75688791

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/004,276 Abandoned US20210131426A1 (en) 2019-11-05 2020-08-27 Plunger pump

Country Status (3)

Country Link
US (1) US20210131426A1 (ja)
JP (1) JP2021076028A (ja)
CN (1) CN112780515A (ja)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2011013162A1 (ja) * 2009-07-27 2013-01-07 株式会社島津製作所 プランジャ駆動式計量ポンプ
WO2012002141A1 (ja) * 2010-06-28 2012-01-05 株式会社イワキ 往復動ポンプ
JP5981669B1 (ja) * 2016-02-01 2016-08-31 株式会社イワキ プランジャポンプ
JP2017141718A (ja) * 2016-02-09 2017-08-17 株式会社ミクニ プランジャポンプ
JP6905442B2 (ja) * 2017-09-29 2021-07-21 株式会社イワキ プランジャポンプ

Also Published As

Publication number Publication date
CN112780515A (zh) 2021-05-11
JP2021076028A (ja) 2021-05-20

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